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Aluminum oxide/aluminum-based spinel composite material as well as preparation method and catalytic application thereof

A composite material and spinel technology, which is applied in the field of alumina/aluminum-based spinel composite materials and its preparation, can solve problems such as the inability to apply continuous flow liquid, the inability to form macroscopic particles, and the lack of practical application value on an industrial scale. , to achieve the effects of easy recycling and regeneration, easy solid-liquid separation, and improved production safety

Pending Publication Date: 2022-01-28
南京科立林环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although there have been some reports on spinel catalysts, especially aluminum-based spinel catalysts at home and abroad, these catalysts are basically nano or micro powders synthesized by various chemical methods and cannot be formed into macroscopic materials. Granular, so batch catalytic experiments can only be carried out intermittently in containers such as beakers, and cannot be applied to continuous flow liquid systems, thus lacking practical application value on an industrial scale

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Alumina / CoAl 2 o 4 Preparation of catalyst particles. Aluminum oxide pellets with a diameter of 1 mm (mainly γ-Al 2 o 3 ) after cleaning and drying at 80°C. Will Co(NO 3 ) 2 and AlCl 3 Dissolve in 100ml of water at the same time to form a uniformly mixed solution with a Co concentration of 0.1mol / L and an Al concentration of 0.2mol / L. Then 100 g of alumina pellets were added thereto, stirred and then vacuum impregnated for 12 h. Then solid-liquid separation, the pellets were taken out, dried at 50°C to obtain the precursor, and then calcined at 600°C for 4 hours to obtain alumina / CoAl 2 o 4 catalyst.

Embodiment 2

[0035] Alumina / CuAl 2 o 4 Preparation of catalyst particles. Aluminum oxide balls with a diameter of 0.5 mm (mainly γ-Al 2 o 3 ) after cleaning and drying at 80°C. Cu(NO 3 ) 2 and AlCl 3 Dissolve in 100ml of water at the same time to form a mixed uniform solution with a Cu concentration of 0.2mol / L and an Al concentration of 0.3mol / L. Then 100 g of alumina particles were added thereto, stirred and then vacuum impregnated for 6 h. Then solid-liquid separation, take out the pellets, dry at 50°C to obtain the precursor, and then calcined at 700°C for 4h to obtain alumina / CuAl 2 o 4 catalyst.

Embodiment 3

[0037] Alumina / MnAl 2 o 4 Preparation of catalyst particles. Alumina particles with a diameter of 2 mm and a length of 4 mm (mainly α-Al 2 o 3 ) after cleaning and drying at 80°C. Mn(NO 3 ) 2 and Al 2 (SO 4 ) 3 Dissolve in 100ml of water at the same time to form a uniformly mixed solution with a Mn concentration of 0.4mol / L and an Al concentration of 0.8mol / L. Then 100 g of alumina particles were added thereto, stirred and then vacuum impregnated for 10 h. Then solid-liquid separation, take out the pellets, dry at 50°C to obtain the precursor, and then calcined at 900°C for 6h to obtain alumina / MnAl 2 o 4 catalyst.

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Abstract

The invention provides an aluminum oxide / aluminum-based spinel composite material as well as a preparation method and catalytic application thereof. The preparation method comprises the steps of cleaning dust and impurities on the surfaces of aluminum oxide particles with water, and then drying; preparing a mixed solution containing aluminum ions and other metal ions; adding aluminum oxide particles into the mixed solution for vacuum impregnation; taking out the impregnated particles and drying to obtain precursor particles; and calcining the precursor to obtain the granular aluminum oxide / aluminum-based spinel composite material. The preparation method is simple in process, low in cost and suitable for large-scale production, and the prepared composite material has excellent catalytic performance and can efficiently activate persulfate to degrade organic pollutants in a wide pH range from acidity to alkalinity; and meanwhile, the composite material has appropriate particle size and stable structure and physicochemical properties, can be used in a stirring barrel, a fixed bed and a fluidized bed for a long time, and realizes continuous and long-acting catalytic degradation of organic wastewater.

Description

technical field [0001] The invention relates to the field of catalyst preparation and application in sulfate radical advanced oxidation process (SR-AOPs), in particular to an alumina / aluminum-based spinel composite material, its preparation method and its catalytic application. Background technique [0002] With the rapid development of my country's industry and agriculture, the negative impact caused by the large discharge of wastewater containing organic pollutants is also increasing. Therefore, the disposal of this type of wastewater has become a key issue in the field of environmental protection. Although there are a variety of mature physical, chemical, and biological disposal methods, it is still difficult to fully meet the needs of efficient, economical, and safe governance in many aspects. Sulfate Radical Advanced Oxidation Process (SR-AOPs) is a kind of advanced oxidation technology in the chemical method, through the activation of persulfate to generate strong oxid...

Claims

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Application Information

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IPC IPC(8): B01J23/755B01J23/72B01J23/745B01J23/75B01J23/06B01J23/34C02F1/72C02F101/30
CPCB01J23/755B01J23/72B01J23/745B01J23/75B01J23/06B01J23/34B01J23/005C02F1/725C02F2101/30
Inventor 朱宾楠
Owner 南京科立林环保科技有限公司
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